[unix-history] / usr / src / sys.386bsd / isofs / isofs_vfsops.c

#include "param.h"
#include "systm.h"
#include "namei.h"
#include "proc.h"
#include "kernel.h"
#include "vnode.h"
#include "specdev.h"
#include "mount.h"
#include "buf.h"
#include "file.h"
#include "dkbad.h"
#include "disklabel.h"
#include "ioctl.h"
#include "errno.h"
#include "malloc.h"

#include "iso.h"
#include "isofs_node.h"

extern int enodev ();

struct vfsops isofs_vfsops = {
	isofs_mount,
	isofs_start,
	isofs_unmount,
	isofs_root,
	(void *)enodev, /* quotactl */
	isofs_statfs,
	isofs_sync,
	isofs_fhtovp,
	isofs_vptofh,
	isofs_init
};

/*
 * Called by vfs_mountroot when ufs is going to be mounted as root.
 *
 * Name is updated by mount(8) after booting.
 */
#define ROOTNAME	"root_device"

isofs_mountroot()
{
	register struct mount *mp;
	extern struct vnode *rootvp;
	struct proc *p = curproc;	/* XXX */
	struct iso_mnt *imp;
	register struct fs *fs;
	u_int size;
	int error;

	mp = (struct mount *)malloc((u_long)sizeof(struct mount),
		M_MOUNT, M_WAITOK);
	mp->mnt_op = &isofs_vfsops;
	mp->mnt_flag = MNT_RDONLY;
	mp->mnt_exroot = 0;
	mp->mnt_mounth = NULLVP;
	error = iso_mountfs(rootvp, mp, p);
	if (error) {
		free((caddr_t)mp, M_MOUNT);
		return (error);
	}
	if (error = vfs_lock(mp)) {
		(void)isofs_unmount(mp, 0, p);
		free((caddr_t)mp, M_MOUNT);
		return (error);
	}
	rootfs = mp;
	mp->mnt_next = mp;
	mp->mnt_prev = mp;
	mp->mnt_vnodecovered = NULLVP;
	imp = VFSTOISOFS(mp);
	bzero(imp->im_fsmnt, sizeof(imp->im_fsmnt));
	imp->im_fsmnt[0] = '/';
	bcopy((caddr_t)imp->im_fsmnt, (caddr_t)mp->mnt_stat.f_mntonname,
	    MNAMELEN);
	(void) copystr(ROOTNAME, mp->mnt_stat.f_mntfromname, MNAMELEN - 1,
	    &size);
	bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
	(void) isofs_statfs(mp, &mp->mnt_stat, p);
	vfs_unlock(mp);
	return (0);
}

/*
 * Flag to allow forcible unmounting.
 */
int iso_doforce = 1;

/*
 * VFS Operations.
 *
 * mount system call
 */
isofs_mount(mp, path, data, ndp, p)
	register struct mount *mp;
	char *path;
	caddr_t data;
	struct nameidata *ndp;
	struct proc *p;
{
	struct vnode *devvp;
	struct ufs_args args;
	u_int size;
	int error;
	struct iso_mnt *imp;

	if (error = copyin(data, (caddr_t)&args, sizeof (struct ufs_args)))
		return (error);

	if ((mp->mnt_flag & MNT_RDONLY) == 0)
		return (EROFS);

	/*
	 * Process export requests.
	 */
	if ((args.exflags & MNT_EXPORTED) || (mp->mnt_flag & MNT_EXPORTED)) {
		if (args.exflags & MNT_EXPORTED)
			mp->mnt_flag |= MNT_EXPORTED;
		else
			mp->mnt_flag &= ~MNT_EXPORTED;
		if (args.exflags & MNT_EXRDONLY)
			mp->mnt_flag |= MNT_EXRDONLY;
		else
			mp->mnt_flag &= ~MNT_EXRDONLY;
		mp->mnt_exroot = args.exroot;
	}
	/*
	 * If updating, check whether changing from read-only to
	 * read/write; if there is no device name, that's all we do.
	 */
	if (mp->mnt_flag & MNT_UPDATE) {
		imp = VFSTOISOFS(mp);
		if (args.fspec == 0)
			return (0);
	}
	/*
	 * Not an update, or updating the name: look up the name
	 * and verify that it refers to a sensible block device.
	 */
	ndp->ni_nameiop = LOOKUP | FOLLOW;
	ndp->ni_segflg = UIO_USERSPACE;
	ndp->ni_dirp = args.fspec;
	if (error = namei(ndp, p))
		return (error);
	devvp = ndp->ni_vp;
	if (devvp->v_type != VBLK) {
		vrele(devvp);
		return (ENOTBLK);
	}
	if (major(devvp->v_rdev) >= nblkdev) {
		vrele(devvp);
		return (ENXIO);
	}

	if ((mp->mnt_flag & MNT_UPDATE) == 0)
		error = iso_mountfs(devvp, mp, p);
	else {
		if (devvp != imp->im_devvp)
			error = EINVAL;	/* needs translation */
		else
			vrele(devvp);
	}
	if (error) {
		vrele(devvp);
		return (error);
	}
	imp = VFSTOISOFS(mp);
	(void) copyinstr(path, imp->im_fsmnt, sizeof(imp->im_fsmnt)-1, &size);
	bzero(imp->im_fsmnt + size, sizeof(imp->im_fsmnt) - size);
	bcopy((caddr_t)imp->im_fsmnt, (caddr_t)mp->mnt_stat.f_mntonname,
	    MNAMELEN);
	(void) copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, 
	    &size);
	bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
	(void) isofs_statfs(mp, &mp->mnt_stat, p);
	return (0);
}

/*
 * Common code for mount and mountroot
 */
iso_mountfs(devvp, mp, p)
	register struct vnode *devvp;
	struct mount *mp;
	struct proc *p;
{
	register struct iso_mnt *isomp = (struct iso_mnt *)0;
	struct buf *bp = NULL;
	dev_t dev = devvp->v_rdev;
	caddr_t base, space;
	int havepart = 0, blks;
	int error = EINVAL, i, size;
	int needclose = 0;
	int ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
	extern struct vnode *rootvp;
	int j;
	int iso_bsize;
	int iso_blknum;
	struct iso_volume_descriptor *vdp;
	struct iso_primary_descriptor *pri;
	struct iso_directory_record *rootp;
	int logical_block_size;

	if (!ronly)
		return (EROFS);

	/*
	 * Disallow multiple mounts of the same device.
	 * Disallow mounting of a device that is currently in use
	 * (except for root, which might share swap device for miniroot).
	 * Flush out any old buffers remaining from a previous use.
	 */
	if (error = iso_mountedon(devvp))
		return (error);
	if (vcount(devvp) > 1 && devvp != rootvp)
		return (EBUSY);
	vinvalbuf(devvp, 1);
	if (error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, NOCRED, p))
		return (error);
	needclose = 1;

	/* This is the "logical sector size".  The standard says this
	 * should be 2048 or the physical sector size on the device,
	 * whichever is greater.  For now, we'll just use a constant.
	 */
	iso_bsize = 2048;

	for (iso_blknum = 16; iso_blknum < 100; iso_blknum++) {
		if (error = bread (devvp, iso_blknum * iso_bsize / DEV_BSIZE,
				   iso_bsize, NOCRED, &bp))
			goto out;

		vdp = (struct iso_volume_descriptor *)bp->b_un.b_addr;
		if (bcmp (vdp->id, ISO_STANDARD_ID, sizeof vdp->id) != 0) {
			error = EINVAL;
			goto out;
		}

		if (isonum_711 (vdp->type) == ISO_VD_END) {
			error = EINVAL;
			goto out;
		}

		if (isonum_711 (vdp->type) == ISO_VD_PRIMARY)
			break;
		brelse(bp);
	}

	if (isonum_711 (vdp->type) != ISO_VD_PRIMARY) {
		error = EINVAL;
		goto out;
	}
	
	pri = (struct iso_primary_descriptor *)vdp;

	logical_block_size = isonum_723 (pri->logical_block_size);

	if (logical_block_size < DEV_BSIZE
	    || logical_block_size >= MAXBSIZE
	    || (logical_block_size & (logical_block_size - 1)) != 0) {
		error = EINVAL;
		goto out;
	}

	rootp = (struct iso_directory_record *)pri->root_directory_record;

	isomp = (struct iso_mnt *)malloc(sizeof *isomp,M_UFSMNT,M_WAITOK);
	isomp->logical_block_size = logical_block_size;
	isomp->volume_space_size = isonum_733 (pri->volume_space_size);
	bcopy (rootp, isomp->root, sizeof isomp->root);
	isomp->root_extent = isonum_733 (rootp->extent);
	isomp->root_size = isonum_733 (rootp->size);

	isomp->im_bsize = logical_block_size;
	isomp->im_bmask = ~(isomp->im_bsize - 1);
	isomp->im_bshift = 0;
	while ((1 << isomp->im_bshift) < isomp->im_bsize)
		isomp->im_bshift++;

	bp->b_flags |= B_INVAL;
	brelse(bp);
	bp = NULL;

	isomp->im_ronly = ronly;
	if (ronly == 0)
		isomp->im_fmod = 1;

	mp->mnt_data = (qaddr_t)isomp;
	mp->mnt_stat.f_fsid.val[0] = (long)dev;
	mp->mnt_stat.f_fsid.val[1] = MOUNT_ISOFS;
	mp->mnt_flag |= MNT_LOCAL;
	isomp->im_mountp = mp;
	isomp->im_dev = dev;
	isomp->im_devvp = devvp;

	devvp->v_specflags |= SI_MOUNTEDON;

	return (0);
out:
	if (bp)
		brelse(bp);
	if (needclose)
		(void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, NOCRED, p);
	if (isomp) {
		free((caddr_t)isomp, M_UFSMNT);
		mp->mnt_data = (qaddr_t)0;
	}
	return (error);
}

/*
 * Make a filesystem operational.
 * Nothing to do at the moment.
 */
/* ARGSUSED */
isofs_start(mp, flags, p)
	struct mount *mp;
	int flags;
	struct proc *p;
{

	return (0);
}

/*
 * unmount system call
 */
isofs_unmount(mp, mntflags, p)
	struct mount *mp;
	int mntflags;
	struct proc *p;
{
	register struct iso_mnt *isomp;
	int i, error, ronly, flags = 0;

	if (mntflags & MNT_FORCE) {
		if (!iso_doforce || mp == rootfs)
			return (EINVAL);
		flags |= FORCECLOSE;
	}
	mntflushbuf(mp, 0);
	if (mntinvalbuf(mp))
		return (EBUSY);
	isomp = VFSTOISOFS(mp);

	if (error = vflush(mp, NULLVP, flags))
		return (error);
	ronly = !isomp->im_ronly;
	isomp->im_devvp->v_specflags &= ~SI_MOUNTEDON;
	error = VOP_CLOSE(isomp->im_devvp, ronly ? FREAD : FREAD|FWRITE,
		NOCRED, p);
	vrele(isomp->im_devvp);
	free((caddr_t)isomp, M_UFSMNT);
	mp->mnt_data = (qaddr_t)0;
	mp->mnt_flag &= ~MNT_LOCAL;
	return (error);
}

/*
 * Check to see if a filesystem is mounted on a block device.
 */
iso_mountedon(vp)
	register struct vnode *vp;
{
	register struct vnode *vq;

	if (vp->v_specflags & SI_MOUNTEDON)
		return (EBUSY);
	if (vp->v_flag & VALIASED) {
		for (vq = *vp->v_hashchain; vq; vq = vq->v_specnext) {
			if (vq->v_rdev != vp->v_rdev ||
			    vq->v_type != vp->v_type)
				continue;
			if (vq->v_specflags & SI_MOUNTEDON)
				return (EBUSY);
		}
	}
	return (0);
}

/*
 * Return root of a filesystem
 */
isofs_root(mp, vpp)
	struct mount *mp;
	struct vnode **vpp;
{
	register struct iso_node *ip;
	struct iso_node *nip;
	struct vnode tvp;
	int error;
	struct iso_mnt *imp = VFSTOISOFS (mp);

	tvp.v_mount = mp;
	ip = VTOI(&tvp);
	ip->i_vnode = &tvp;
	ip->i_dev = imp->im_dev;
	error = iso_iget(ip, imp->root_extent, &nip,
			 (struct iso_directory_record *) imp->root);
	if (error)
		return (error);
	*vpp = ITOV(nip);
	return (0);
}

/*
 * Get file system statistics.
 */
isofs_statfs(mp, sbp, p)
	struct mount *mp;
	register struct statfs *sbp;
	struct proc *p;
{
	register struct iso_mnt *isomp;
	register struct fs *fs;

	isomp = VFSTOISOFS(mp);

	sbp->f_type = MOUNT_ISOFS;
	sbp->f_fsize = isomp->logical_block_size;
	sbp->f_bsize = sbp->f_fsize;
	sbp->f_blocks = isomp->volume_space_size;
	sbp->f_bfree = 0; /* total free blocks */
	sbp->f_bavail = 0; /* blocks free for non superuser */
	sbp->f_files =  0; /* total files */
	sbp->f_ffree = 0; /* free file nodes */
	if (sbp != &mp->mnt_stat) {
		bcopy((caddr_t)mp->mnt_stat.f_mntonname,
			(caddr_t)&sbp->f_mntonname[0], MNAMELEN);
		bcopy((caddr_t)mp->mnt_stat.f_mntfromname,
			(caddr_t)&sbp->f_mntfromname[0], MNAMELEN);
	}
	return (0);
}

isofs_sync(mp, waitfor)
	struct mount *mp;
	int waitfor;
{
	return (0);
}

/*
 * File handle to vnode
 *
 * Have to be really careful about stale file handles:
 * - check that the inode number is in range
 * - call iget() to get the locked inode
 * - check for an unallocated inode (i_mode == 0)
 * - check that the generation number matches
 */
isofs_fhtovp(mp, fhp, vpp)
	register struct mount *mp;
	struct fid *fhp;
	struct vnode **vpp;
{
	return (EINVAL);
#if 0
	/* here's a guess at what we need here */
	struct vnode tvp;
	int error;

	ifhp = (struct ifid *)fhp;
	imp = VFSTOISOFS (mp);

	if (ifhp->ifid_lbn >= imp->volume_space_size)
		return (EINVAL);

	if (ifhp->ifid_offset + sizeof (struct iso_directory_record)
	    >= imp->im_bsize)
		return (EINVAL);

	bread (isomp->im_devvp, ifhp->ifid_lbn, imp->im_bsize, NOCRED, &bp);

	dirp = bp->b_un.b_addr + ifhp->ifid_offset;

	if (ifhp->ifid_offset + isonum_711 (dirp) >= imp->im_bsize) {
		brelse (bp);
		return (EINVAL);
	}

	tvp.v_mount = mp;
	ip = VTOI(&tvp);
	ip->i_vnode = &tvp;
	ip->i_dev = imp->im_dev;
	if (error = iso_iget(ip, ifhp->ifid_ino, &nip, dirp)) {
		*vpp = NULLVP;
		brelse (bp);
		return (error);
	}
	ip = nip;
	*vpp = ITOV(ip);
	brelse (bp);
	return (0);
#endif
}

/*
 * Vnode pointer to File handle
 */
/* ARGSUSED */
isofs_vptofh(vp, fhp)
	struct vnode *vp;
	struct fid *fhp;
{
	return (EINVAL);
#if 0
	register struct inode *ip = VTOI(vp);
	register struct ufid *ufhp;

	ufhp = (struct ufid *)fhp;
	ufhp->ufid_len = sizeof(struct ufid);
	ufhp->ufid_ino = ip->i_number;
	ufhp->ufid_gen = ip->i_gen;
	return (0);
#endif
}
Commit	Line	Data
e38fb7f6 WJ	1	#include "param.h"
	2	#include "systm.h"
	3	#include "namei.h"
	4	#include "proc.h"
	5	#include "kernel.h"
	6	#include "vnode.h"
	7	#include "specdev.h"
	8	#include "mount.h"
	9	#include "buf.h"
	10	#include "file.h"
	11	#include "dkbad.h"
	12	#include "disklabel.h"
	13	#include "ioctl.h"
	14	#include "errno.h"
	15	#include "malloc.h"
	16
	17	#include "iso.h"
	18	#include "isofs_node.h"
	19
	20	extern int enodev ();
	21
	22	struct vfsops isofs_vfsops = {
	23	isofs_mount,
	24	isofs_start,
	25	isofs_unmount,
	26	isofs_root,
	27	(void )enodev, / quotactl */
	28	isofs_statfs,
	29	isofs_sync,
	30	isofs_fhtovp,
	31	isofs_vptofh,
	32	isofs_init
	33	};
	34
	35	/*
	36	* Called by vfs_mountroot when ufs is going to be mounted as root.
	37	*
	38	* Name is updated by mount(8) after booting.
	39	*/
	40	#define ROOTNAME "root_device"
	41
	42	isofs_mountroot()
	43	{
	44	register struct mount *mp;
	45	extern struct vnode *rootvp;
	46	struct proc p = curproc; / XXX */
	47	struct iso_mnt *imp;
	48	register struct fs *fs;
	49	u_int size;
	50	int error;
	51
	52	mp = (struct mount *)malloc((u_long)sizeof(struct mount),
	53	M_MOUNT, M_WAITOK);
	54	mp->mnt_op = &isofs_vfsops;
	55	mp->mnt_flag = MNT_RDONLY;
	56	mp->mnt_exroot = 0;
	57	mp->mnt_mounth = NULLVP;
	58	error = iso_mountfs(rootvp, mp, p);
	59	if (error) {
	60	free((caddr_t)mp, M_MOUNT);
	61	return (error);
	62	}
	63	if (error = vfs_lock(mp)) {
	64	(void)isofs_unmount(mp, 0, p);
65	free((caddr_t)mp, M_MOUNT);
66	return (error);
67	}
68	rootfs = mp;
69	mp->mnt_next = mp;
70	mp->mnt_prev = mp;
71	mp->mnt_vnodecovered = NULLVP;
72	imp = VFSTOISOFS(mp);
73	bzero(imp->im_fsmnt, sizeof(imp->im_fsmnt));
74	imp->im_fsmnt[0] = '/';
75	bcopy((caddr_t)imp->im_fsmnt, (caddr_t)mp->mnt_stat.f_mntonname,
76	MNAMELEN);
77	(void) copystr(ROOTNAME, mp->mnt_stat.f_mntfromname, MNAMELEN - 1,
78	&size);
79	bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
80	(void) isofs_statfs(mp, &mp->mnt_stat, p);
81	vfs_unlock(mp);
82	return (0);
83	}
84
85	/*
86	* Flag to allow forcible unmounting.
87	*/
88	int iso_doforce = 1;
89
90	/*
91	* VFS Operations.
92	*
93	* mount system call
94	*/
95	isofs_mount(mp, path, data, ndp, p)
96	register struct mount *mp;
97	char *path;
98	caddr_t data;
99	struct nameidata *ndp;
100	struct proc *p;
101	{
102	struct vnode *devvp;
103	struct ufs_args args;
104	u_int size;
105	int error;
106	struct iso_mnt *imp;
107
108	if (error = copyin(data, (caddr_t)&args, sizeof (struct ufs_args)))
109	return (error);
110
111	if ((mp->mnt_flag & MNT_RDONLY) == 0)
112	return (EROFS);
113
114	/*
115	* Process export requests.
116	*/
117	if ((args.exflags & MNT_EXPORTED) \|\| (mp->mnt_flag & MNT_EXPORTED)) {
118	if (args.exflags & MNT_EXPORTED)
119	mp->mnt_flag \|= MNT_EXPORTED;
120	else
121	mp->mnt_flag &= ~MNT_EXPORTED;
122	if (args.exflags & MNT_EXRDONLY)
123	mp->mnt_flag \|= MNT_EXRDONLY;
124	else
125	mp->mnt_flag &= ~MNT_EXRDONLY;
126	mp->mnt_exroot = args.exroot;
127	}
128	/*
129	* If updating, check whether changing from read-only to
130	* read/write; if there is no device name, that's all we do.
131	*/
132	if (mp->mnt_flag & MNT_UPDATE) {
133	imp = VFSTOISOFS(mp);
134	if (args.fspec == 0)
135	return (0);
136	}
137	/*
138	* Not an update, or updating the name: look up the name
139	* and verify that it refers to a sensible block device.
140	*/
141	ndp->ni_nameiop = LOOKUP \| FOLLOW;
142	ndp->ni_segflg = UIO_USERSPACE;
143	ndp->ni_dirp = args.fspec;
144	if (error = namei(ndp, p))
145	return (error);
146	devvp = ndp->ni_vp;
147	if (devvp->v_type != VBLK) {
148	vrele(devvp);
149	return (ENOTBLK);
150	}
151	if (major(devvp->v_rdev) >= nblkdev) {
152	vrele(devvp);
153	return (ENXIO);
154	}
155
156	if ((mp->mnt_flag & MNT_UPDATE) == 0)
157	error = iso_mountfs(devvp, mp, p);
158	else {
159	if (devvp != imp->im_devvp)
160	error = EINVAL; /* needs translation */
161	else
162	vrele(devvp);
163	}
164	if (error) {
165	vrele(devvp);
166	return (error);
167	}
168	imp = VFSTOISOFS(mp);
169	(void) copyinstr(path, imp->im_fsmnt, sizeof(imp->im_fsmnt)-1, &size);
170	bzero(imp->im_fsmnt + size, sizeof(imp->im_fsmnt) - size);
171	bcopy((caddr_t)imp->im_fsmnt, (caddr_t)mp->mnt_stat.f_mntonname,
172	MNAMELEN);
173	(void) copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1,
174	&size);
175	bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
176	(void) isofs_statfs(mp, &mp->mnt_stat, p);
177	return (0);
178	}
179
180	/*
181	* Common code for mount and mountroot
182	*/
183	iso_mountfs(devvp, mp, p)
184	register struct vnode *devvp;
185	struct mount *mp;
186	struct proc *p;
187	{
188	register struct iso_mnt isomp = (struct iso_mnt )0;
189	struct buf *bp = NULL;
190	dev_t dev = devvp->v_rdev;
191	caddr_t base, space;
192	int havepart = 0, blks;
193	int error = EINVAL, i, size;
194	int needclose = 0;
195	int ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
196	extern struct vnode *rootvp;
197	int j;
198	int iso_bsize;
199	int iso_blknum;
200	struct iso_volume_descriptor *vdp;
201	struct iso_primary_descriptor *pri;
202	struct iso_directory_record *rootp;
203	int logical_block_size;
204
205	if (!ronly)
206	return (EROFS);
207
208	/*
209	* Disallow multiple mounts of the same device.
210	* Disallow mounting of a device that is currently in use
211	* (except for root, which might share swap device for miniroot).
212	* Flush out any old buffers remaining from a previous use.
213	*/
214	if (error = iso_mountedon(devvp))
215	return (error);
216	if (vcount(devvp) > 1 && devvp != rootvp)
217	return (EBUSY);
218	vinvalbuf(devvp, 1);
219	if (error = VOP_OPEN(devvp, ronly ? FREAD : FREAD\|FWRITE, NOCRED, p))
220	return (error);
221	needclose = 1;
222
223	/* This is the "logical sector size". The standard says this
224	* should be 2048 or the physical sector size on the device,
225	* whichever is greater. For now, we'll just use a constant.
226	*/
227	iso_bsize = 2048;
228
229	for (iso_blknum = 16; iso_blknum < 100; iso_blknum++) {
230	if (error = bread (devvp, iso_blknum * iso_bsize / DEV_BSIZE,
231	iso_bsize, NOCRED, &bp))
232	goto out;
233
234	vdp = (struct iso_volume_descriptor *)bp->b_un.b_addr;
235	if (bcmp (vdp->id, ISO_STANDARD_ID, sizeof vdp->id) != 0) {
236	error = EINVAL;
237	goto out;
238	}
239
240	if (isonum_711 (vdp->type) == ISO_VD_END) {
241	error = EINVAL;
242	goto out;
243	}
244
245	if (isonum_711 (vdp->type) == ISO_VD_PRIMARY)
246	break;
247	brelse(bp);
248	}
249
250	if (isonum_711 (vdp->type) != ISO_VD_PRIMARY) {
251	error = EINVAL;
252	goto out;
253	}
254
255	pri = (struct iso_primary_descriptor *)vdp;
256
257	logical_block_size = isonum_723 (pri->logical_block_size);
258
259	if (logical_block_size < DEV_BSIZE
260	\|\| logical_block_size >= MAXBSIZE
261	\|\| (logical_block_size & (logical_block_size - 1)) != 0) {
262	error = EINVAL;
263	goto out;
264	}
265
266	rootp = (struct iso_directory_record *)pri->root_directory_record;
267
268	isomp = (struct iso_mnt )malloc(sizeof isomp,M_UFSMNT,M_WAITOK);
269	isomp->logical_block_size = logical_block_size;
270	isomp->volume_space_size = isonum_733 (pri->volume_space_size);
271	bcopy (rootp, isomp->root, sizeof isomp->root);
272	isomp->root_extent = isonum_733 (rootp->extent);
273	isomp->root_size = isonum_733 (rootp->size);
274
275	isomp->im_bsize = logical_block_size;
276	isomp->im_bmask = ~(isomp->im_bsize - 1);
277	isomp->im_bshift = 0;
278	while ((1 << isomp->im_bshift) < isomp->im_bsize)
279	isomp->im_bshift++;
280
281	bp->b_flags \|= B_INVAL;
282	brelse(bp);
283	bp = NULL;
284
285	isomp->im_ronly = ronly;
286	if (ronly == 0)
287	isomp->im_fmod = 1;
288
289	mp->mnt_data = (qaddr_t)isomp;
290	mp->mnt_stat.f_fsid.val[0] = (long)dev;
291	mp->mnt_stat.f_fsid.val[1] = MOUNT_ISOFS;
292	mp->mnt_flag \|= MNT_LOCAL;
293	isomp->im_mountp = mp;
294	isomp->im_dev = dev;
295	isomp->im_devvp = devvp;
296
297	devvp->v_specflags \|= SI_MOUNTEDON;
298
299	return (0);
300	out:
301	if (bp)
302	brelse(bp);
303	if (needclose)
304	(void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD\|FWRITE, NOCRED, p);
305	if (isomp) {
306	free((caddr_t)isomp, M_UFSMNT);
307	mp->mnt_data = (qaddr_t)0;
308	}
309	return (error);
310	}
311
312	/*
313	* Make a filesystem operational.
314	* Nothing to do at the moment.
315	*/
316	/* ARGSUSED */
317	isofs_start(mp, flags, p)
318	struct mount *mp;
319	int flags;
320	struct proc *p;
321	{
322
323	return (0);
324	}
325
326	/*
327	* unmount system call
328	*/
329	isofs_unmount(mp, mntflags, p)
330	struct mount *mp;
331	int mntflags;
332	struct proc *p;
333	{
334	register struct iso_mnt *isomp;
335	int i, error, ronly, flags = 0;
336
337	if (mntflags & MNT_FORCE) {
338	if (!iso_doforce \|\| mp == rootfs)
339	return (EINVAL);
340	flags \|= FORCECLOSE;
341	}
342	mntflushbuf(mp, 0);
343	if (mntinvalbuf(mp))
344	return (EBUSY);
345	isomp = VFSTOISOFS(mp);
346
347	if (error = vflush(mp, NULLVP, flags))
348	return (error);
349	ronly = !isomp->im_ronly;
350	isomp->im_devvp->v_specflags &= ~SI_MOUNTEDON;
351	error = VOP_CLOSE(isomp->im_devvp, ronly ? FREAD : FREAD\|FWRITE,
352	NOCRED, p);
353	vrele(isomp->im_devvp);
354	free((caddr_t)isomp, M_UFSMNT);
355	mp->mnt_data = (qaddr_t)0;
356	mp->mnt_flag &= ~MNT_LOCAL;
357	return (error);
358	}
359
360	/*
361	* Check to see if a filesystem is mounted on a block device.
362	*/
363	iso_mountedon(vp)
364	register struct vnode *vp;
365	{
366	register struct vnode *vq;
367
368	if (vp->v_specflags & SI_MOUNTEDON)
369	return (EBUSY);
370	if (vp->v_flag & VALIASED) {
371	for (vq = *vp->v_hashchain; vq; vq = vq->v_specnext) {
372	if (vq->v_rdev != vp->v_rdev \|\|
373	vq->v_type != vp->v_type)
374	continue;
375	if (vq->v_specflags & SI_MOUNTEDON)
376	return (EBUSY);
377	}
378	}
379	return (0);
380	}
381
382	/*
383	* Return root of a filesystem
384	*/
385	isofs_root(mp, vpp)
386	struct mount *mp;
387	struct vnode **vpp;
388	{
389	register struct iso_node *ip;
390	struct iso_node *nip;
391	struct vnode tvp;
392	int error;
393	struct iso_mnt *imp = VFSTOISOFS (mp);
394
395	tvp.v_mount = mp;
396	ip = VTOI(&tvp);
397	ip->i_vnode = &tvp;
398	ip->i_dev = imp->im_dev;
399	error = iso_iget(ip, imp->root_extent, &nip,
400	(struct iso_directory_record *) imp->root);
401	if (error)
402	return (error);
403	*vpp = ITOV(nip);
404	return (0);
405	}
406
407	/*
408	* Get file system statistics.
409	*/
410	isofs_statfs(mp, sbp, p)
411	struct mount *mp;
412	register struct statfs *sbp;
413	struct proc *p;
414	{
415	register struct iso_mnt *isomp;
416	register struct fs *fs;
417
418	isomp = VFSTOISOFS(mp);
419
420	sbp->f_type = MOUNT_ISOFS;
421	sbp->f_fsize = isomp->logical_block_size;
422	sbp->f_bsize = sbp->f_fsize;
423	sbp->f_blocks = isomp->volume_space_size;
424	sbp->f_bfree = 0; /* total free blocks */
425	sbp->f_bavail = 0; /* blocks free for non superuser */
426	sbp->f_files = 0; /* total files */
427	sbp->f_ffree = 0; /* free file nodes */
428	if (sbp != &mp->mnt_stat) {
429	bcopy((caddr_t)mp->mnt_stat.f_mntonname,
430	(caddr_t)&sbp->f_mntonname[0], MNAMELEN);
431	bcopy((caddr_t)mp->mnt_stat.f_mntfromname,
432	(caddr_t)&sbp->f_mntfromname[0], MNAMELEN);
433	}
434	return (0);
435	}
436
437	isofs_sync(mp, waitfor)
438	struct mount *mp;
439	int waitfor;
440	{
441	return (0);
442	}
443
444	/*
445	* File handle to vnode
446	*
447	* Have to be really careful about stale file handles:
448	* - check that the inode number is in range
449	* - call iget() to get the locked inode
450	* - check for an unallocated inode (i_mode == 0)
451	* - check that the generation number matches
452	*/
453	isofs_fhtovp(mp, fhp, vpp)
454	register struct mount *mp;
455	struct fid *fhp;
456	struct vnode **vpp;
457	{
458	return (EINVAL);
459	#if 0
460	/* here's a guess at what we need here */
461	struct vnode tvp;
462	int error;
463
464	ifhp = (struct ifid *)fhp;
465	imp = VFSTOISOFS (mp);
466
467	if (ifhp->ifid_lbn >= imp->volume_space_size)
468	return (EINVAL);
469
470	if (ifhp->ifid_offset + sizeof (struct iso_directory_record)
471	>= imp->im_bsize)
472	return (EINVAL);
473
474	bread (isomp->im_devvp, ifhp->ifid_lbn, imp->im_bsize, NOCRED, &bp);
475
476	dirp = bp->b_un.b_addr + ifhp->ifid_offset;
477
478	if (ifhp->ifid_offset + isonum_711 (dirp) >= imp->im_bsize) {
479	brelse (bp);
480	return (EINVAL);
481	}
482
483	tvp.v_mount = mp;
484	ip = VTOI(&tvp);
485	ip->i_vnode = &tvp;
486	ip->i_dev = imp->im_dev;
487	if (error = iso_iget(ip, ifhp->ifid_ino, &nip, dirp)) {
488	*vpp = NULLVP;
489	brelse (bp);
490	return (error);
491	}
492	ip = nip;
493	*vpp = ITOV(ip);
494	brelse (bp);
495	return (0);
496	#endif
497	}
498
499	/*
500	* Vnode pointer to File handle
501	*/
502	/* ARGSUSED */
503	isofs_vptofh(vp, fhp)
504	struct vnode *vp;
505	struct fid *fhp;
506	{
507	return (EINVAL);
508	#if 0
509	register struct inode *ip = VTOI(vp);
510	register struct ufid *ufhp;
511
512	ufhp = (struct ufid *)fhp;
513	ufhp->ufid_len = sizeof(struct ufid);
514	ufhp->ufid_ino = ip->i_number;
515	ufhp->ufid_gen = ip->i_gen;
516	return (0);
517	#endif
518	}